Hello 86s / FRS / BRZ / BMWs,
I am looking to get a butterfly valve exhaust and I know which one I want to get, but not 100% sure if installing a butterfly valve exhaust behind the CAT will cause issues. For instance, too much heat as the cat burns away gases created by the engine.
Hopefully someone can give me an idea as I've e-mailed some shops, but quite lazy reply's to be honest.
This the closest I could find to a compact exhaust muffler that can open and close, by Racecraft:
https://racecraftaus.com/products/el...lled-muffler-3
You may be asking why don't just put it at the back, well I have a TOMEI EXPREME TI TITANIUM EXHAUST and trying not to mess with its current cat back setup.
Any help would be great.